Improvement of SERS signal measured by portable Raman instrument using random sampling technique

In recent years, portable Raman spectrometers and commercialized surface-enhanced scattering (SERS) substrates have become increasingly popular. They turned out to be great tools for both substance detection, identification, analysis on-site. This work addresses the technique collect proper spectra using SERS spectrometers. We propose a random sampling that gives representative high-quality with high intensity good resolution. was tested on home-built spectrometer based metal film over nano-sphere (MFON) structure. Experimental results showed peaks of spectrum collected are significantly narrower than those measured in conventional one prevent samples from photoinduced degradation. Potentially, this method can promote quantitative chemical trace